what the f*** is the altering cave for

to mes with our minds

I believe if you do something (still have no idea what...) you can catch Pokemon...

I believe if you do something (still have no idea what...) you can catch Pokemon like Shuckle and Houndour inside, but all you have to do is beat the Pokemon League to catch those in the Safari Zone. They'll have added an extra area in the Northern part. Some of the Pokemon are: